SSHCZO -- Groundwater Chemistry, Stream Water Chemistry -- Shale Hills -- (2015-2015)

The time-series of groundwater and streamwater chemistry were monitored at the Shale Hills Critical Zone Observatory using ISCO samplers. The sampling frequency was 1-day. The groundwater samples were collected at CZMW3 at -4m below the surface. The stream water samples were collected near the weir. The groundwater and stream water samples were collected at daily frequency at the Shale Hills Critical Zone Observatory. The groundwater samples were collected at CZMW3 and the stream water samples were collected near the weir. To preserve sample integrity for reactive elements such as Fe and Mn, a gravitational filtration system was employed (Kim et al 2012). GFS used 0.22μm Supor membrane filters (Pall Corperation). When the ISCO samplers were full, the samples were retrieved to the laboratory and were acidified (1% v/v) using Optima Nitric acid in the GFS bottles. To recover the precipitated and adsorbed phases of solutes, the acidified samples were sit at least 24 hours and the transferred to 50mL metal free centrifuge tubes. Major cations and silica were analyzed on an inductively coupled plasma–optical emission spectrometer (ICP– OES).

在页岩山关键带观测站，利用ISCO采样器对地下水及溪流水化学时间序列进行了监测。采样频率为每日一次。地下水样本于地表以下-4米处的CZMW3点采集。溪流水样本则在堰附近采集。在页岩山关键带观测站，地下水样本于CZMW3点采集，溪流水样本于堰附近采集。为了保持反应性元素如铁（Fe）和锰（Mn）的样本完整性，采用了重力过滤系统（Kim et al. 2012）。重力过滤系统使用了Pall Corporation生产的0.22μm Supor膜滤器。当ISCO采样器满载时，样本被带回实验室，并在GFS瓶中使用Optima硝酸进行酸化（体积比1%）。为了恢复溶质中沉淀和吸附相，酸化后的样本静置至少24小时，随后转移至50mL的无金属离心管中。主要阳离子和二氧化硅则采用电感耦合等离子体-光学发射光谱仪（ICP-OES）进行分析。